This exciting murder mystery, set in the eighteenth-century, delves into the Anglo-Saxon past.

Tom and Dr Harker's latest adventure takes them outside London to visit a friend, Mr Gibbs, in Norfolk who has recently unearthed fabulous Anglo-Saxon treasures from an archaeological excavation. They are believed to have belonged to the East-Anglian king, Raedwulf. Local legend tells of a ghostly guardian of the king's tomb and a curse against anyone who threatens it.

When not one but two murders occur in the Gibbs' household, it is hard to dismiss the legend. As the atmosphere of hostility increases, Tom and Harker investigate. Discovering in fact that Gibbs' wife is behind the attacks seems to explain what's been happening. But then Tom sees a figure in the mist.